body {

}

.signin {
    width:477px;
    height:479px;
    margin:0 auto;

    position:absolute;
    top:50%;
    left:50%;
    margin-top:-239px;
    margin-left:-238px;
}
.signin-head {
    margin:0 auto;
    padding-top:30px;
    padding-left:30px;
    width:120px;
}
.form-signin {
    max-width: 330px;
    padding: 43px 15px 15px 15px;
    margin: 0 auto;
}
.form-signin .checkbox {
    margin-bottom: 10px;
}
.form-signin .checkbox {
    font-weight: normal;
}
.form-signin .form-control {
    position: relative;
    font-size: 16px;
    height: auto;
    padding: 10px;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}
.form-signin .form-control:focus {
    z-index: 2;
}

.form-signin button {
    border-radius: 0;
}